Grip plate for a gun



FIG. 1 is a side elevational view of a grip plate for a gun showing mynew design, the gun being shown in broken lines for illustrativepurposes only and forming no part of the claimed design;

FIG. 2 is another side view thereof;

FIG. 3 is an end elevational view thereof; and,

FIG. 4 is a top plan view thereof.

The ornamental design for a grip plate for a gun, as shown.